On forum: 06/06/2009
You don't need a mod to get to Jupiter or Pripyat before you should, though you do need to raise your jump_speed, so you'd have to create a gamedata with the right pathway leading to the actor.ltx|
You can ask Pilot to take you to Jupiter and, once there, use the unmarked level-changers to go to either Zaton or Pripyat.
If you go to Pripyat you will mess up your game, though.
The level-changers are on the roof of the inaccessible railway shed behind Yanov Station - one end of the roof is to Zaton, the other end to Pripyat. There is also a level-changer on the roof of a high building in Zaton that leads to Jupiter.
A preoccupation with the next world is a clear indication of an inability to cope credibly with this one.